Moonshot's Kimi K3 is matching Opus 4.8 and GPT 5.5 on many benchmarks, and demand got so intense the company had to pause new subscriptions. Thinking Machines' Inkling and a soon-to-launch Qwen 3.8 suggest open models are multiplying fast, squeezing the proprietary leaders. Kimi K3 is just one of a growing number of open-weight models making life interesting for OpenAI and Anthropic. Last week, Thinking Machines released an open-weight model called Inkling, which includes a mixture-of-experts transformer and with 975 million parameters. “It feels a lot safer than the world where Open-weight models = nuclear weapons with humanity’s annihilation.”